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光 ひかり通信 つうしん技術 ぎじゅつでした
hikaritsūshingijutsudeshita

敬
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Noun
, 
Desu Copula

The polite past form of 光通信技術

1. Optical communication technology was.

Past/Perfective
, 
Polite

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光通信技術でした

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